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Selective alterations in immunoregulatory lymphocyte subsets in early HIV (human T-lymphotropic virus type III/lymphadenopathy-associated virus) infection

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Abstract

In order to characterize the effects of HIV (human T-lymphotropic virus type III/lymphadenopathy-associated virus) on the immune system, Leu8 and Leu8+ subsets of CD4 and CD8 cells were studied in seropositive homosexually active men without acquired immune deficiency syndrome (AIDS). Controls included both heterosexual men and HIV-seronegative homosexually active men. The decrease in CD4 levels, observed in HIV-seropositive men who were asymptomatic, as well as in those who had persistent generalized lymphadenopathy or constitutional symptoms of HIV infection, occurred proportionally in both the Leu8 and the Leu8+ CD4 subsets. This observation, that HIV infection does not selectively diminish either subset of CD4 cells, indicates that the selective loss of T cell-mediated functions which accompanies the development of AIDS is not related to preferential loss of the Leu8+ CD4 subset. Among CD8 cells, however, HIV infection resulted in a threefold elevation in the number of Leu8 CD8 cells, while the number of Leu8+ CD8 cells remained constant. The increase in Leu8 CD8 cells was present in recent seroconverters, persistently seropositive men, and patients with AIDS. We propose that the increase in Leu8 CD8 cells represents an HIV-specific cytotoxic T-cell response. These cells may operate by killing infected CD4 cells, thereby partially controlling viral infection while simultaneously contributing to the destruction of the immune system.

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Giorgi, J.V., Nishanian, P.G., Schmid, I. et al. Selective alterations in immunoregulatory lymphocyte subsets in early HIV (human T-lymphotropic virus type III/lymphadenopathy-associated virus) infection. J Clin Immunol 7, 140–150 (1987). https://doi.org/10.1007/BF00916008

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